Dibenzothiadiazocines



United States Patent 3,534,062 DIBENZOTHIADIAZOCINES John B. Wright, Kalamazoo, Micln, assignor to The Upjohn Company, Kalamazoo, Mich., a corporation of Delaware No Drawing. Filed May 16, 1967, Ser. No. 638,740 Int. Cl. C07d 93/36 US. Cl. 260327 Claims ABSTRACT OF THE DISCLOSURE 5H dibenzo[c,gl [1,2,6]thiadiazocine-IS,6-dioxides are prepared by condensing a 2-nitrobenzenesulfonyl chloride with a Z-aminobenzophenone, followed by catalytic reduction and cyclodehydration.

These compounds are useful as starting materials for the preparation of bleaching agents, disinfectants, mothproofing agents, and/or herbicides; they are also useful as protective agents against anaphylaxis and other allergic conditions, and as antidiabetic agents.

BACKGROUND OF THE INVENTION The 5H dibenzo[c,g] f l,2,6]thiadiazocine-6,6-dioxides disclosed and claimed herein have not been reported previously in literature.

SUMMARY OF THE INVENTION The compounds contemplated herein can be represented by the structural formula wherein X, Y, and Z can be halo, trifiuoromethyl, alkyl, or alkoxy radicals and R can be hydrogen, alkyl, aralkyl, alkanoyl, alkylaminoalkyl, l-pyrrolidinylalkyl, alkyl-substituted l-pyrrolidinylalkyl, piperidinoalkyl, alkyl-substituted piperidinoalkyl, hexahydro-l-azepinylalkyl, or alkyl substituted hexahydrol-azepinylalkyl radical. The respective alkyl portions of the foregoing radicals contain no more than four carbon atoms, however, and n, m, and p are integers having a value from 0 to 3, inclusive.

These compounds are useful as starting materials for the preparation of bleaching agents, disinfectants, mothproofing agents, and/or herbicides; they are also useful as protective agents against anaphylaxis and other allergic conditions, and as antidiabetic agents.

DETAILED DESCRIPTION OF THE INVENTION The compounds of the present invention, shown by Formula I, can be prepared by condensing, under reflux conditions, a 2-nitrobenzenesulfonyl chloride represented by the structural formula NH2 p SOzCl with a 2-aminobenzophenone represented by the formula to produce the corresponding 2-aroyl-4-nitrobenzenesulfonanilide which can be shown by the formula NO o t i X, Y, Z, m, n, and p having the same meaning as above.

Compounds of the type shown by Formula IV are then reduced using iron and acetic acid, a noble metal catalyst such as platinum and hydrogen under pressure, zinc and acetic acid, or zinc and hydrochloric acid, to the corresponding 2'-aroyl 4 aminobenzenesulfonanilides which can be shown by the formula X, Zn

s N l 0 0 H X, Y, Z, n, m, and p having the same meaning as above.

Cyclodehydration of compounds of the type shown by Formula V in an aromatic solvent such as toluene, benzene, xylene, or the like, produces compounds shown by Formula I where R is hydrogen. The cyclodehydration is carried out in an acid medium, i.e., in the presence of an acid such as concentrated sulfuric acid, aluminum trichloride, p-toluene sulfonic acid, and the like, and under reflux conditions.

In Formulas I, II, III, IV, and V, illustrative alkyl radicals are methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec.-butyl, and tert.-butyl; illustrative aralkyl radicals are benzyl, phenylethyl, naphthylethyl, phenylbutyl, and the like; illustrative alkoxy radicals are methoxy, ethoxy, the propoxy, and the butoxy radicals; and illustrative alkanoyl radicals are formyl, acetyl, propionyl, butyryl, and the like.

Similarly, illustrative alkylaminoalkyl radicals are (methylamino)ethyl, 2-(diethylamino)ethyl, 3-(diethylamino)propyl, 4-(diethylamino)butyl, 4-(N-methyl-N-ethylamino)butyl, 2-(isopropylamino)ethyl, 2-(diisopropylamino)ethyl, 4-(tert.-butylamino)butyl, and the like;

illustrative alkyl-substituted l-pyrrolidinylalkyl radicals are 2- (2-methyl-l-pyrrolidinyl) ethyl, 3-(Z-methyl-l-pyrrolidinyl)propyl, 2-(2,2,4-trimethyl-l-pyrrolidinyl)ethyl, (Z-methyl-l-pyrrolidinyl)methyl, 4-(2,4-diethyl-1-pyrrolidinyl)butyl, 4-(2-butyl-4ethyl-l-pyrrolidinylJbutyl, 2-(3-tert.-butyl-l-pyrrolidinyl)ethyl, and the like, illustrative alkyl-substituted piperidinoalkyl radicals are 2-(2-methylpiperidino)ethyl, 2-(3-methylpiperidino)etliyl, 2-(4-methylpiperidino)ethyl, 4-(3-isopropylpiperidino)butyl, 4-(4-tert.-butylpiperidino) butyl, 3-(Z-methyl-S-ethylpiperidino)propyl, 2-(2,3,S-triethylpiperidino)ethyl, 4-(2,4,6-trimethylpiperidino)butyl, and the like; and illustrative alkyl-substituted hexahydro 1 azepinylalkyl radicals are 2-(2-ethylhexahydro-1-azepinyl)ethyl, 2-(4-tert.-butyll1exahydro-l-azepinyl )ethyl, 4-(2,4-dimethylhexahydro-l-azepiuyl)butyl, 3-(3,3-dimethy1hexahydro-l-azepinyl)propyl, 2-(2,4,6-tri-n-propylhexahydro-l-azepinyl)ethyl, and the like.

Illustrative halo radicals contemplated herein are fiuoro, chloro, bromo, and iodo.

The cyclodehydrated product produced in this manner is a 12-phenyl-5H-dibenzo[c,g][1,2,6]thiadiazocine-6,6- dioxide. An organic side chain can be placed on the nucleus of the foregoing compound in lieu of the hydrogen existing in the 5-position by reacting the cyclodehydrated product with an organic halide, the organic portion of which is the desired side chain. The addition of the side chain is usually carried out under reflux conditions in a suitable aqueous solvent and in the presence of an alkali metal hydroxide such as sodium hydroxide, potassium hydroxide, and the like.

Those of the foregoing compounds which contain a basic side chain in the 6-position, i.e., the compounds where R is alkylaminoalkyl, l-pyrrolidinylalkyl, alkylsubstituted l-pyrrolidinylalkyl, piperidinoalkyl, alkylsubstituted piperidinoalkyl, hexahydro-l-azepinylalkyl, or alkyl-substituted hexahydrol-azepinylalkyl radical, can also exist in the protonated or acid addition salt form. Stable acid addition salts can be formed with acids such as hydrochloric, hydrobromic, sulfuric, phosphoric, nitric, acetic, benzoic, salicylic, glycolic, succinic, nicotinic, tartaric, maleic, malic, pamoic, methanesulfonic, picric, cyclohexane sulfamic, lactic, and the like.

The 2-nitrobenzenesulfonyl chlorides which can be employed as starting materials herein are Well known in the art and are commercially available. Illustrative Z-nitrobenzenesulforiyl chlorides are 2 nitrobenzenesulfonyl chloride, 2-nitro-4-chlorobenzenesulfonyl chloride, 2-nitro-4-methoxybenzenesulfonyl chloride, 2-nitro-4-bromobenzenesulfonyl chloride, 2 nitro-4,5-dimethoxybenzenesulfonyl chloride, 2-nitro-5'-chlorobenzenesulfonyl chloride, etc.

Similarly, the other starting material, a 2-aminobenzophenone, is a well known compound. Methods for the preparation of Z-arninobenzophenones are taught by Lo throp et al., J. Am. Chem. Soc. 65, 363 (1943) and Sternbach et al., J. Org. Chem. 27, 3781 and 3788 (1962).

Illustrative Z-aminobenzophenones are 2-amino-4-bromobenzophenone, 2-amino-3-bromobenzophenone,

Z-am ino-4'-bromobenzophenone,

2-arni no-S-bromobenzophenonc, 2-amino-6-bromobenzophenone,

2-amino-3 ,5 -dibromobenzophenone, 2-amino-2-f1uoro-S-bromobenzophenone, 2-amino-4-me thoxy-S -bromobenzophenone,

4 2-amino 4'-methyl-5-bromobenzophenone, 2-amino 2'-chlorobenzophenone, 2-amino-2'-chlorobenzophenone, Z-amino-3-cl1lorobenzophenone, Z-amino-4-chlorobenzophenone, Z-amino-4-chlorobenzophenone, 2-amino-5-chlorobenzophenone, 2-amino-6-chlorobenzophenone, Z-amino-2,5-dichlorobenzophenone, 2-amino-3,S-dichlorobenzophenone, 2-amino-4,S-dichlorobenzophenorie, 2-amino-4,S-dichlorobenzophenone, 2amino-2'-fluoro5-chlorobenzophenone, 2-amino-3-fiuoro-S-chlorobenzophenonc, 2-amino-4'-fluoro-5-chlorobenzophenone, 2-amino-2'-chloro-S-methylbenzophenone, 2-amino-3'-chloro-4-methylbenzophenone.

Still other 2-amiriobenzophenones are 2-amino-2'-chloro-4,S-dimethylbenzophenone, Z-amino-Z',4'-dichloro-4,5-dimethylbenzophenone, 2-amino-2,5'-dichloro-4,5-dimethylbenzophenorie, 2-amino-2-methoxy-5-chlorobenzophenone, 2-amino-4'-methoxy-S-chlorobenzophenone, Z-amino-Z-methoxyJ-chloro-5'-methylbenzophenone, Z-amino-2-fluorobenzophenone, 2-amino-4'-fiuorobenzophenone, 2-amino 5fluorobenzophenone, 2-amino-2'-fiuoro-S-methylbenzophenone, 2-amino-2-trifiuoromethylbenzophenone, 2-amino 3-trifitloromethylbenzophenone, 2-amino-3'-trifluoromethylbenzophenone, 2-amino-4-trifluoromethylbenzophenone, 2-amino-2',5-di(trifiuoromethyl)benzophenone, 2-amino-2-methoxybenzophenone, 2-amino-4-methoxybenzophenone, Z-amino-4'-methoxybenzophenone, Z-amino-S-methoxybenzophenone, 2-amino-2',4-dimethoxybenzophenone, 2-amino-3,4-dimethoxybenzophenone, 2-amino-3',4'-dimethoxybenzophenone, 2-amino-4,4,5-trimethoxybenzophenone, 2-amino-2',5-dimethyl-3-methoxybenzophenone, Z-amino2',3'-dimethyl-4'-methoxybenzophenonc, 2-amino-Z,5-dimethyl-4'-methoxybenzophenone, Zamino-2',4-dimethyl-5-methoxybenzophenone, Z'amino-2methyl-S-methoxybenzophenone, 2-amino-3,4-dimethylbenzophenone, 2-isopropoxy-5-chlorobenzophenone, 2-amino-3-propyl-5butylbenzophenone, 2-amino-4ethyl-4'-butylbenzophenone, etc.

The overall synthetic route for the preparation of the compounds of this invention is schematically illustrated below in the preparation of 2-chloro-5-methyl-1Z-phenyl- 5H-dibenzo-[c,g] [1,2,6]thiadiaz0cine-6,6-dioxide:

pyridine Compounds of this invention represented by Formula I where R is hydrogen can be reacted with chlorine to produce active chlorine compounds in which the hydrogen is replaced by chlorine. These active chlorine compounds are useful as bleaching agents, antisepties, and disinfectants similar to the compounds disclosed in U.S. Pat. 3,115,495. In addition, the compounds where R is hydrogen are protective agents against anaphylaxis in mammals as has been substantiated by tests in guinea pigs, rats, and mice, and also are useful as antidiabetic agents.

Compounds of the type shown by Formula I where R is alkyl, aralkyl, or alkanoyl are also useful as antidiabetic and anti-inflammatory agents.

Compounds of the type shown by Formula I where R is a basic side chain are useful as central nervous system stimulants in mammals. These compounds will also form salts with fiuosilicic acid which are useful as mothproofing agents in accordance with the teachings of U.S. Pat. 1,915,334 and U.S. Pat. 2,075,359. These compounds also form salts with thioeyanic acid which, in turn, condense with formaldehyde and produce resinous materials useful as pickling inhibitors according to U.S. Pat. 2,425,320 and U.S. Pat. 2,606,155. Similarly, salts of the compounds of Formula I where R is a basic side chain with trichloroacetic acid are useful as herbicides against Johnson grass, yellow foxtail, green foxtail, Bermuda grass, quack grass, and the like.

Compounds of Formula I can also be catalytically reduced by hydrogen in the presence of a noble metal catalyst so as to produce the corresponding dihydro derivatives, i.e., the ll,l2-dihydro-l2-phenyl-5H-dibenzo[c,gl[1,2,6] thiadiazocine-6,6-dioxides. These latter compounds also form salts with fluosilicic acid, thiocyanic acid, or trichloracetic acid which are useful, respectively, as mothproofing agents. in the manufacture of pickling inhibitors, and as herbicides.

Compounds of the type shown by Formula IV and Formula V are useful as intermediates for the preparation of compounds of Formula I as disclosed herein.

When used pharmaeologieally as set forth above, for purposes of administration the compounds of this invention can be combined with solid or liquid pharmaceutical carriers and formulated in the form of tablets, powder packets, or capsules, using starch and similar excipicnts. or dissolved or suspended in suitable solvents or vehicles, for oral or parenteral administration.

This invention is further illustrated by the following examples.

EXAMPLE I Preparation of 2'-benzoyl-4'-chloro-2- nitrobenzenesulfonanilide A solution of 2-amino-S-chlorobenzophenone (about grams, 0.108 mole) and o-nitrobenzencsulfonyl chloride (about 23.9 grams, 0.108 mole) in pyridine (about 50 milliliters) was prepared, refluxed for about one hour, and then concentrated by evaporation of the pyridine in vacuo. The obtained residue was washed with water and thereafter recrystallized from ethanol. About 35.2 grams of tan. prismatic crystals melting at 118 to 120 C. was obtained. The crystals were identified as 2'-benzoyl 4- chloro-Zmitrobenzenesulfonanilide, obtained in about 78.5 percent yield.

Annlysis. -Calcd for C H ClN O S (percent): C, 54.74; H. 3.14; Cl, 8.51; N. 6.72; S, 7.69. Found (percent): C, 54.81; H, 2.89; C]. 8.59; N, 6.90; S, 7.86.

EXAMPLE II Preparation of 2-amino-2'-benzoyl-4- chlorobenzenesulfonanilide About 10 grams of finely divided iron powder (100 mesh) was gradually added over a time period of about minutes to a stirred solution of 2-benzoyl4-ehloro-2- nitrobenzenesulfonanilide (about 13.7 grams, 0.033 mole). After the addition was complete, the resulting admixture was maintained at about 95 C. for an additional time period of about 45 minutes, and thereafter a small amount of water (about 15 milliliters) was added.

The resulting admixture was then heated to and held at about 95 C. for about one hour and 45 minutes after which time the admixture was allowed to cool and ice water (about 400 milliliters) was added thereto.

The thus produced mixture was extracted with several aliquots of methylene chloride, the extracts combined and dried over magnesium sulfate. and thereafter concentrated by evaporation of the methylene chloride.

The obtained oily residue was observed to crystallize. The residue was then recrystallized from 95 weight percent ethanol. About 10.8 grams of crystals in the form of tan prisms melting at 965 to 97.5 C. was obtained. The crystals were identified as 2-amino-2-benzoyl-4-chlorobenzenesulfonanilide, obtained in about percent yield.

Analysis.Calc'd for C1gH15ClN2O3S (percent): C, 58.99; H, 3.91; Cl. 9.16: N, 7.24; S, 8.29. Found: (percent): C, 58.92; H, 3.99; Cl, 9.27; N, 6.90; S, 8.26.

EXAMPLE III Preparation of 2-chloro-lZ-phenyl-SH-dibenzo- [c,g] [1,2,6]thiadiazocine-6,6-dioxide 2 amino-2'-benzoyl 4' ehlorobenzenesulfonanilide (about 5 grams, 0.013 mole) was dissolved in dry toluene (about 50 milliliters) and refluxed under a water trap for about 10 minutes, then p-tolucnesulfonic acid (about 0.2 grams) was added thereto, and the refluxing continued for about 16 hours during which time about 0.013 mole of water was recovered from the refluxing mixture.

The mixture was then extracted with a dilute aqueous ammonium hydroxide solution (weight ratio of water to ammonia about 20:1 respectively) and subsequently with Water. The ammonium hydroxide and water extracts were combined and extracted with methylene chloride, and the methylene chloride extract dried over magnesium sulfate and concentrated by evaporation.

The remaining residue was dissolved in 1 weight percent aqueous sodium hydroxide solution and reprecipitated by the addition of acetic acid. The obtained precipitate was recovered by filtration and recrystallized from weight percent ethanol. About 2.12 grams of crystals in the form of yellow prisms melting at 188 to 189 C. was produced. The crystals were identified as 2-chloro-12-phenyl-5H- dibenz0[c,g] {1,2,6]thiadiazocine-6,6-dioxide, obtained in about 44.4 percent yield.

Analysis.Calcd for C1gH13C1N202S (percent): C, 61.87; H, 3.55; Cl, 9.61; N, 7.60; S, 8.69. Found (percent): C, 61.89; H, 3.36; Cl, 9.71; N, 7.61; S, 8.62.

In a manner similar to Examples I through III but starting with 2-amino-3-bromobenzophenone instead of 2 amino 5 chlorobenzophenone the 4 bromo 12- phenyl 5H dibenzo]c,g] [1,2,6]thiadiazocine 6,6 dioxide can be prepared, starting with 2-amino-3,5-dibromobenzophenone the 2,4-dibrrn0-l2-phenyl-5H-dibenzo[c,g][l,2,6]thiadiazocine-6,6-dioxide can be prepared, starting with 2-amino-2'-fluoro-5-bromobenzophenone the 2 bromo-l2-(2-fluorophenyl)-5H-dibenzo [c,g| [1,2,6]thiadiazocine 6.6 dioxide can be prepared, starting with 2-amino-4-methoxy-5-brornobenzophenone the 2 bromo-3-methoxy-l2-phenyl-5H-dibenzo[c,gl[1, 2,6]thiadiazocine-6,6-dioxide can be prepared, starting with 2-amino-2'-chloro-4,5-dimethylbenzophenone, the 2, 3-dimethyl-l2-(2-chlorophenyl) H dibenzoitagl |.l,2,6] thiadiazocine-6,6-dioxide can be prepared, starting with 2-amino-2'-methoxy-5-chloro-5-rnethylbenzophenone the 2-chloro-l2-(Z-methoxy-S-methylphenyl) 5H dibenzo [c,g] [1,2,6]thiadiazocine-6,6-dioxide can be prepared, starting with 2-aminc-3-trifiuoromethylbenzophenone the 4 trifluoromethyld2-phenyl 5H dibenzo[c,g][1,2,6] thiadiazocine-6,6-dioxide can be prepared, etc.

Similarly, using 2-nitro 4 methoxybenzenesulfonyl chloride instead of o-nitrobenzenesulfonyl chloride the 2-chloro-9-methoxy-12-phenyl 5H dibenzo[c,g][1,2,6] thiadiazocine 6,6 dioxide can be prepared, using 2- nitro-4-bromobenzenesulfonyl chloride the 2-chlor0-9- bromo l2 phenyl-5H-dibenzo[c,g] [1,2,6]thiadiazocine- 6,6-dioxide can be prepared, using 2-nitro-4,5-dimethoxybenzenesulfonyl chloride the 2-chloro-8,9-dimethoxy-12- phenyl-SH-dibenzo [c.g] [1,2,6]thiadiazocine 6,6 dioxide can be prepared, etc.

EXAMPLE IV Preparation of 2-chloro-5-[2-(diethylamino)ethyl] 12- phenyl-SH-dibenzo [c,g] [1,2,6]thiadiaZocine-6,6-dioxide Diethylaminoetheyl chloride (about 5.07 grams, 0.037 mole) was added to a stirred solution of 2-chloro-l2- phenyl-5H-dibenzo[c,gl[1,2,6]thiadiazocine-6,6 dioxide (about 9.4 grams, 0.025 mole) in ethanol (about 70 milliliters) and 2.5 weight percent aqueous sodium hydroxide solution (about 50 milliters) maintained at about C. After the addition was complete, the resulting mixture was stirred at about room temperature for about five hours, then left standing for about 18 hours, diluted with water (about 250 milliliters) and filtered.

About 11.75 grams of yellow, prismatic crystals melting at 126 to 128 C. was recovered upon filtration. Recrystallization from 95 weight percent ethanol did not elevate the melting point of the crystals. The crystals were identified as 2-chloro-5-[2-(diethylamino)ethyll-l2-phenyl-5H-dibenzo[c,g] [1,2,6]thiadiazocine 6,6 dioxide, obtained in about 100 percent yield.

AnaIysis.Calcd for C H ClN O S (percent): C, 64.16; H, 5.60; Cl, 7.57; N, 8.98; S 6.85. Found (percent): C, 63.91; H, 5.73; CI, 7.80; N, 9.00; S, 7.13.

In a manner similar to Example IV, using benzoyl chloride in lieu of diethylaminoethyl chloride, the 2- chloro-S-benzoyl 12 phenyl 5H dibenzo[c,g][1,2,6] thiadiazocine-6,6-dioxide can be prepared, using acetyl chloride the 2-chloro 5 acetyl-lZ-phenyl-SH-dibenzo [c,g] [1,2,6]thiadiazocine 6,6 dioxide can be prepared, using Z-(diisopropylamino)ethyl chloride hydrochloride the 2 chloro-S-[2-(diisopropylamino)ethyl1-12-phenyl- 5H-dibenzo[c,g][l,2,6]thiadiazocine-6,6-dioxide can be prepared, using 2-(2-methyl-1-pyrrolidinyl)ethy1 chloride hydrochloride the 2-chloro-5-[2-(Z-methyl-l-pyrrolidinyl)ethyl]l2-phenyl 5H dibenzotqg][1,2,6]thiadiazocine-6,6-dioxide can be prepared, using 2-(2,2,4-trimethyl-l-pyrrolidinyl)ethyl chloride the 2-chloride-5-l'2 (2,2,4-trimethyl-1-pyrrolidinyl)ethyl] 12 phenyl-SH- dibenzo[c.g][1,2,6]thiadiazocine-6,6-dioxide can be prepared, using N-(beta-chloroethyl)piperidine hydrochloride the 2-chloro-5-(2-piperidinoethyl)-12-phenyl-5H-dibenzo[c,g][1,2,6]thiadiazocine-6,6-dioxide can be prepared, using N-hexamethyleneiminoethyl chloride the 2- chloro-S-(hexahydro-lH-azepin-l-yl) 12 phenyl-5H-dibenzo[c,g][1,2,6]thiadiazocine-6,6-dioxide can be prepared, using 2-(tert.-butylamino)ethyl chloride hydrochloride the 2-chloro-5-[2-(tert.-butylamino)ethyll-lZ-phenyl-5H-dibenzo[c,g] [1,2,6]thiadiazocine 6,6 dioxide can be prepared, using 3-(dimethylamino)propyl chloride the 2-chloro-5-[3-(dimethylamino)-propyl] 12 phenyl-SH- dibenzo[c,g'][1,2,6]thiadiazocine-6,6-dioxide can be prepared, using N-(gamma-chloropropyl)pipcridine the 2- chloro-S-(3-piperidinopropyl)-l2-pheny1 5H dibenzo [c,g}[1,2,6]thiadiazocine-6,6'dioxide can be prepared, etc.

EXAMPLE V Preparation of 2-chloro-5-methyl- 1 Z-phenyl-SH-dibenzo [c,g] [1,2,6] thiadianocine-6,6 dioxide Methyl iodide (about 11.5 milliliters) was added to a stirred solution of 2-chloro-12-phenyl-5H-dibenzo[c,g] [1,2,6]thiadiazocine-6,6-dioxide (21.2 grams, 0.058 mole) in water (about milliliters), ethanol (about 180 milliliters), and an aqueous 5 weight percent solution of sodium hydroxide (about 60 milliliters), chilled to about 5 C. The resulting mixture was stirred at about room temperature for about five hours, more methyl iodide (about 11.5 milliliters) added, and the admixture diluted with an equal volume of water and then filtered.

Upon filtration about 21.9 grams of a yellow solid melting at 228 to 230 C. was recovered. Recrystallization from ethyl acetate produced about 16.4 grams of colorless, prismatic crystals melting at 230 to 232 C. A second recrystallization did not elevate the melting point further. The crystals were identified as 2-cl1loro-5- methyl-12-phenyl 5H dibenzo [c,g] [1,2,6]thiadiazocine 6,6-dioxide, obtained in about 99 percent yield.

AnaIysis.Calcd for C H, ClN O S (percent): C, 62.74; H, 3.95; C], 9.26; N, 7.32; S, 8.37. Found (percent): C, 62.36; H, 4.08; Cl, 9.45; N, 7.37; S, 8.00.

In a manner analogous to Example V but using ethyl iodide in lieu of methyl iodide the 2-chloro 5-ethyl-12 phenyl-5H-dibenzo[c,g] [l,2,6]thiadiazocine-6,6 dioxide can be prepared, using propyl iodide the 2-chloro-5 propyl-IZ-phenyl 5H dibenzo[c,g][1,2,6]thiadiazocine-6, 6-dioxide can be prepared, using isopropyl iodide the 2- chloro-S-isopropyl-l2-phenyl 5H dibenzo[c,g][l,2,6] thiadiazocine-6,6-dioxide can be prepared, using butyl iodide the 2 chloro-S-butyl-lZ-phenyl-SH-dibenzo[c,g] [1,2,6]thiadiazocine-6,6-dioxide can be prepared, etc.

EXAMPLE VI Preparation of 2'benzoyl-4,4-dichloro-2-nitrobcnzenesulfonanilide A solution of 2-amino-5-chlorobenzophenone (about 25 grams, 0.l08 mole) and 4-chloro-2-nitrobenzenesulfonyl chloride (about 27.63 grams, 0.108 mole) in pyridine (about 50 milliliters) was prepared and refluxed for about one hour. Thereafter the pyridine was removed from the solution by evaporation in vacuo, and the remaining residue was triturated with water and then with hot ethanol. About 37.8 grams of a crystalline solid melting at 161 to l67.5 C. was obtained. Recrystallization from ethyl acetate raised the melting point to 168 to 170 C. The solid was identified as 2'-bcnzoyl-4,4-dichloro 2- nitrobenzenesulfonanilide, obtained in about 78 percent yield.

Anulysis.-Calcd for C H, Cl N O S (percent): C, 50.57; H, 2.68; C], 15.71; N, 6.21; S, 7.11. Found (percent): C, 50.79; H, 2.31; C], 15.82; N, 6.17; S, 7.15.

EXAMPLE V11 Preparation of 2-amino-2'-benz0yl-4,4'-dichlorobcnzensulfonanilide 2'-benzoyl-4,4'-dichloro 2 nitrobenzen sulfonanilide (about 2075 grams, 0.046 mole) was dissolved in acetic acid (about 280 milliliters). While the resulting solution was stirred, about 14 grams of finely divided iron powder was gradually added over a time period of about 75 minutes, and at a temperature of about 90 to 95 C. After the addition of the iron powder was completed the resulting admixture was permitted to stand for about 18 hours.

Thereafter the admixture was heated to and maintained at about 90 C. for about 45 minutes after which time period water (about 21 milliliters) was added thereto. Subsequently the obtained admixture was again held at about 90 C. for about 105 minutes, and then allowed to cool to about room temperature.

The cooled admixture was diluted with water (about 560 milliliters), and extracted with dichloromethane. The extract was concentrated by evaporation of the dichloromethane and the obtained residue recrystallized from ethanol. Tan, prismatic crystals melting at 108 to 109 C. were obtained. The crystals were identified as Z-amino- 2.-benzoyl-4,4'-dichlorobenzenesulfonanilide.

Analysis.Calcd for C H CI N O S (percent): C, 54.17; H, 3.35; Cl, 16.83; N, 6.65; S, 7.61. Found (percent): C, 53.90; H, 3.04; C], 16.66; N, 6.53; S, 7.65.

EXAMPLE VIII Preparation of 2,9-dichloro-l2-phenyl-5H-dibenzo[c,g] [1,2,6]thiadiazocine-6,6-dioxide A mixture of 2-amino-2'-benzoyl-4,4'-dichlorobenzenesulfonanilide (about 12.6 grams, 0.03 mole), p-toluenesulfonic acid (about 0.5 gram), and toluene (about 200 milliliters) was heated under reflux for about 23 hours using a water trap. Thereafter the mixture was filtered, and the filtrate extracted with a dilute aqueous ammonium hydroxide solution (weight ratio of water to ammonia about 20:1, respectively) and subsequently with Water. The foregoing aqueous extracts were then combined and extracted with dichloromethane several times.

The dichloromethane extracts were, in turn, combined and extracted with an aqueous 1 weight percent sodium hydroxide solution. The resulting alkaline extract was then used to further extract the above filtrate, i.e., the toluene solution, acidified with acetic acid, and then extracted with dichloromethane.

The latter dichloromethane extract was concentrated by evaporating the dichloromethane and the thus-obtained residue recrystallized from ethanol. About 3.34 grams of yellow, prismatic crystals melting at 241 to 242.5 C. were produced. An additional recrystallization raised the melting point to 242 to 243 C. The crystals were identified as 2,9-dichloro12-phenyl 5H dibenzo[c,g][1,2,6] thiadiazocine-6,6-dioxide.

Analysis.Calcd for C H CI N O S (percent): C, 56.59; H, 3.00; Cl, 17.58; N, 6.95; S, 7.95. Found (percent): C, 56.72; H, 3.37; C], 17.85; N, 6.80; S, 8.08.

I claim:

1. A 5H-dibenzo[c,g][1,2,6]thiadiazocine-6,6 dioxide represented by the formula X, zn

SN I o o R wherein X, Y, and Z are members of the group consisting of halo, trifluoromethyl, alkyl, and alkoxy radicals, R is a 5 member of the group consisting of hydrogen, alkyl,

phenylalkyl, naphthylalkyl, alkanoyl, alkylaminoalkyl, 1- pyrrolidinylalkyl, alkyl-substituted l-pyrrolidinylalkyl, piperidinoalkyl, alkyl-substituted piperidinoalkyl, hexahydro-l-azepinylalkyl, and alkyl-substituted hexahydrol-azepinlalkyl radicals, and m, n, and p are integers having a value from 0 to 3 inclusive, with the proviso that the alkyl portions of the foregoing radicals contain no more than four carbon atoms; and the corresponding acid addition salts thereof.

2. The compound in accordance with claim 1 wherein R is hydrogen, Z is chloro situated in the 2-position, m and 2 have value of zero, and n has a value of 1.

3. The compound in accordance with claim 1 wherein R is hydrogen, Z is chloro situated in the 2-position, X is chloro situated in the 9-position, in has a value of zero, and n and p have a value of 1.

4. The compound in accordance with claim 1 wherein R is 2-(diethylamino)ethyl, Z is chloro situated in the 2-position, m and 1 have a value of zero, and n has a value of 1.

5. The compound in accordance with claim 1 wherein R is methyl, Z is chloro situated in the 2-position, m and 1 have a value of zero, and n has a value of 1.

References Cited UNITED STATES PATENTS 3,090,783 5/1963 Yale 260-243 3,123,614 3/1964 Yale et al 260-296 3,247,224 4/1966 Enders et a1. 260327 3,387,002 6/1968 Yale et al 260-327 OTHER REFERENCES Klosa: Chemical Abstract, vol. 58 (1963), p. 12562.

JAMES A. PATTEN, Primary Examiner US. Cl. X.R.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,53, 062 Dated 0611- 3, 97

John B. Wright Inventor(s) It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 1, l i ne 6}, for "NH read N0 Column 2, l ine 15,

for "Z read Y Column 2, l i ne 20, for "Y read Z Column 5, l i ne 8, for (0 0 read (H 0 II 1-c read Column 7,

Column 5, l i ne 15, for l i ne 1, for "1c, 9]" read [c, g] Column 7, l i ne 3 for "Diethy lami noe theyl read Di ethylami noethyl Column 7,

I i ne 68, for "chloride" read ch-loro Column 10, l i ne 20,

clai m 1, for "azepi nlalky l read ,azepi ny lal kyl Signed and sealed this lst day of June 1971.

(SEAL) Attest:

EDWARD M.FIETCHER,JR. WILLIAM E. SCHUYIER, JR. Attesting Officer Commissioner of Patents FORM PC4 50 (1 uscoMM-oc 6O376-P69 UJ. GOVEIHIIIIT FIINTIIG OFFICE IIII O-liI-l" 

